Wait a minute--I'm not asking for help here. I know that most people can't install FO1 on XP and thus need to manually copy the .DATs in order to play. But I don't. Just the other day, I installed FO1 from the CD on my Win XP machine, humungous install, with no trouble whatsoever. The autorun ran fine, too. So does anyone have any idea why it might work for me and not for most others?